Question

A) -3/7 + 1/3 = B) (-5/6) × (+2/5) = C) (-3/10) - (+1/4) = D) -3/8/2/5 =​

Answer 1

Explicação passo a passo:

A) $-\frac{3}{7}+\frac{1}{3}=\frac{-9+7}{21}=-\frac{2}{21}$

B) $\left(-\frac{5}{6}\right)\times \left(+\frac{2}{5}\right)=-\frac{5}{6}\times \frac{2}{5}=-\frac{2}{6}=-\frac{1}{3}$

C) $\left(-\frac{3}{10}\right)-\left(+\frac{1}{4}\right)=-\frac{3}{10}-\frac{1}{4}=\frac{-6-5}{20}=-\frac{11}{20}$

D) $-\frac{3}{\frac{8}{\frac{2}{5}}}=\frac{\frac{3\cdot \:2}{1\cdot \:5}}{8}=-\frac{\frac{6}{5}}{8}=\frac{6}{5\cdot \:8}=-\frac{6}{40}=-\frac{3}{20}$

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